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Finding the Fourth Proportional to 13,905.42, 20,860.18 and 4,043.42

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Solution

The fourth proportional to 13,905.42, 20,860.18 and 4,043.42 is: 6,065.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,905.42 : 20,860.18 = 4,043.42 : x
  2. Step 2: Convert to fraction form
    13,905.42/20,860.18 = 4,043.42/x
  3. Step 3: Cross multiply
    13,905.42x = 20,860.18 × 4,043.42
  4. Step 4: Simplify right side
    13,905.42x = 84,346,469.02
  5. Step 5: Solve for x
    x = 84,346,469.02/13,905.42
  6. Step 6: Final answer
    x = 6,065.73

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.